Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Krypton (Z=36)
  78Kr   79Kr   80Kr   81Kr   82Kr   83Kr   84Kr   85Kr   86Kr
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
82Kr 83Kr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.090 ± 6--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
84 ± 6
901986rVdG, TOF, Au:B-VWLK86
80
1971sAGM71
103.0
2006eendfb7
94.84
2004ejeff31
103.0
2002ejendl33
129
2000tRaT99
76 ± 25
1988tZZC88
100
1986tWLK86
79
1981tHar81
120
1978tWFH78
120
2002tMOST 2002Gor02
112
2005tMOST 2005Gor05


Original:MACS [<σ v>/vT] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise.
Renorm:MACS [<σ v>/vT] (mb) for kT=30 keV for which the reference or standard cross section was meanwhile improved.
Type: The letters and numbers in the column labelled 'type' give information on how the cross section has been obtained:
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
sSemiempirical estimates given in the reference
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
120
122
118
107
98
90 ± 6
80
71
69
62
58
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
7.14
10.26
12.16
12.73
13.04
13.12
13.46
13.36
14.22
14.75
15.45

MACS:
Reference: Wal84,WLK86
Procedure: 'e' (The Maxwellian-averaged cross sections (MACS) from kT=5 keV to 100 keV are obtained from experimental data; the relative uncertainties are similar to those quoted for the 30 keV data.)
Year: 1986

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
82Sr
25.55 d
β+
83Sr
1.35 d
β+
84Sr
0.56%
368 mb
85Sr
64.84 d
β+
86Sr
9.86%
64 mb
81Rb
4.57 h
β+
82Rb
1.27 m
β+
83Rb
86.20 d
β+
84Rb
33.10 d
β+
85Rb
72.17%
234 mb
80Kr
2.28%
267 mb
81Kr
229.02 ka
607 mb, β+
82Kr
11.58%
90 mb
83Kr
11.49%
243 mb
84Kr
57%
38 mb
79Br
50.69%
622 mb
80Br
17.68 m
β-
81Br
49.31%
239 mb
82Br
1.47 d
β-
83Br
2.40 h
β-
78Se
23.77%
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61%
42 mb
81Se
18.45 m
β-
82Se
8.73%
9 mb
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Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Krypton